diff --git a/Gemfile.lock b/Gemfile.lock
index 58353e7d..a3eb0a8f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,6 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
-    archive-tar-minitar (0.5.2)
     arel (5.0.1.20140414130214)
     ast (2.0.0)
     astrolabe (1.3.0)
@@ -110,8 +109,7 @@ GEM
     debugger-linecache (1.2.0)
     diff-lcs (1.2.5)
     docile (1.1.5)
-    docker-api (1.19.0)
-      archive-tar-minitar
+    docker-api (1.20.0)
       excon (>= 0.38.0)
       json
     erubis (2.7.0)
@@ -133,7 +131,7 @@ GEM
     ims-lti (1.1.8)
       builder
       oauth (~> 0.4.5)
-    jbuilder (2.2.8)
+    jbuilder (2.2.9)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)
     jdbc-postgres (9.4.1200)
@@ -222,7 +220,6 @@ GEM
       i18n
       polyamorous (~> 1.1)
     rdoc (4.2.0)
-      json (~> 1.4)
     ref (1.0.5)
     rspec (3.1.0)
       rspec-core (~> 3.1.0)
@@ -297,7 +294,7 @@ GEM
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
-    sshkit (1.6.1)
+    sshkit (1.7.1)
       colorize (>= 0.7.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)